Correct Answer: A

Rationale: The root word 'corp' is related to the body as it comes from the Latin word 'corpus,' meaning body. Words like 'corporal' and 'corporation' are derived from this root, linking them to the body in some manner. Choices B, C, and D are incorrect. 'Auto' relates to self or automatic, 'man' pertains to human or hand, and 'bio' is associated with life or living organisms, none of which directly signify the body.

Correct Answer: B

Rationale: The comma following 'Day' is used incorrectly. Commas are typically not used after single-word identifiers like 'Day' in a sentence unless they are part of a list. In this case, the holiday is referred to as 'Parents' Day,' where the apostrophe is used correctly to indicate possession. The comma following 'Day' is unnecessary and should be removed for proper punctuation. Choices A and D both use apostrophes correctly to indicate possession, so they are not incorrect. The comma following 'Congo' in choice C is necessary to set off the introductory phrase 'a public holiday in the Democratic Republic of Congo.' Therefore, the correct answer is B.

Correct Answer: A

Rationale: The correct spelling is 'potatoes,' with the correct plural form being used in this context. The other choices are spelled correctly: 'saliva,' 'conservators,' and 'restore.' 'Saliva' refers to a bodily fluid, 'conservators' are professionals who work on art conservation, and 'restore' means to bring something back to its original condition or state.

Correct Answer: D

Rationale: In the context of the sentence, 'prized' is used to describe how much people value parrots as pets. Synonyms for 'prized' in this context would include esteemed, cherished, or valued, making option D the most suitable choice. Options A, B, and C do not accurately capture the meaning of 'prized' in this sentence.

Correct Answer: C

Rationale: A complex sentence has one independent clause and at least one dependent clause connected by a subordinating conjunction or a relative pronoun. In choice C, the sentence 'Because the distance between stars in the galaxy is far greater than the distance between planets' is a dependent clause introduced by the subordinating conjunction 'Because,' while the rest of the sentence 'interstellar travel is expected to be an even bigger challenge than interplanetary exploration' forms the independent clause. This combination of an independent clause and a dependent clause makes choice C a complex sentence. Choices A, B, and D do not contain both an independent and dependent clause connected in the way that choice C does, thus they do not qualify as complex sentences.