Correct Answer: D

Rationale: The correct answer is 'Suprarenal.' Breaking down the word parts, 'supra-' means above, and '-renal' pertains to the kidney. Therefore, 'Suprarenal' means above the kidney. Choice A, 'Interrenal,' is incorrect as 'inter-' means between or among. Choice B, 'Subrenal,' is incorrect as 'sub-' means below. Choice C, 'Intrarenal,' is incorrect as 'intra-' means within or inside.

Correct Answer: D

Rationale: The sentence 'However, online students often work entirely from home, which is just one part of what makes online learning different.' provides a contrast and smoothly transitions to a discussion of what makes online learning distinct from traditional classroom settings. Choice A talks about the components of a course but does not transition to a new point. Choice B discusses similarities between online and traditional courses, which does not transition to a new topic. Choice C focuses on interactions with professors but does not transition to a new idea.

Correct Answer: B

Rationale: Option B is the correct answer as it is a complex sentence with a dependent clause ('Before finishing her walk home') followed by an independent clause. In this sentence, 'Before finishing her walk home' acts as the dependent clause that sets the context for the main action, which is 'Raina stopped to watch the sunset.' Option A features two independent clauses connected by a comma and a coordinating conjunction, making it a compound sentence. Option C also has two independent clauses separated by a semicolon, which is incorrect punctuation for a complex sentence. Option D consists of two independent clauses connected by a comma and a coordinating conjunction, forming a compound sentence rather than a complex sentence.

Correct Answer: C

Rationale: The comma after 'home' is unnecessary and should be removed. In this sentence, 'and' is joining two independent clauses, which doesn't require a comma before it. Choices A, B, and D are incorrect because they are correctly placed commas within the sentence.

Correct Answer: C

Rationale: 'Although' is a conjunction because it connects two clauses in the sentence. In the given sentence, 'although' introduces a dependent clause ('although I could use the opportunity more than I'd like to admit') and connects it to the independent clause ('Surely, he thought, I can't trust this enticing yet dubious offer'). This conjunction shows the contrast between the two ideas. Choices A, B, and D are incorrect because 'although' does not function as an adverb, preposition, or adjective in this context.