Correct Answer: A

Rationale: The word 'avian' refers to birds, so the synonym is 'Bird.' In the provided passage, the term 'avian' is used to refer to birds, making 'Bird' the correct synonym. 'Flying' and 'Aerial' are related to the concept of flight but do not specifically refer to birds. 'Plane' refers to an aircraft and is not synonymous with 'avian' or 'bird.' Therefore, 'Bird' is the most appropriate choice as a synonym for avian in this context.

Correct Answer: D

Rationale: The correct answer is D because Hedy Lamarr's invention of a frequency-hopping system, along with George Antheil, laid the foundation for technologies like cellular phones, Bluetooth, and Wi-Fi. This significant contribution revolutionized communication technology. Choice A is incorrect because it focuses on the limitations of the era's technology rather than Lamarr's contributions. Choice B is incorrect as it briefly mentions her collaboration but does not directly relate it to technological advancements. Choice C is incorrect as it highlights her failed inventions, which are not indicative of her significant contributions to technology.

Correct Answer: A

Rationale: The word 'avian' refers to birds, so the synonym is 'Bird.' In the provided passage, the term 'avian' is used to refer to birds, making 'Bird' the correct synonym. 'Flying' and 'Aerial' are related to the concept of flight but do not specifically refer to birds. 'Plane' refers to an aircraft and is not synonymous with 'avian' or 'bird.' Therefore, 'Bird' is the most appropriate choice as a synonym for avian in this context.

Correct Answer: A

Rationale: Hedy Lamarr took up inventing due to boredom from her film roles lacking spoken lines. The extract mentions that to relieve her boredom, Lamarr turned to inventing after her film roles did not provide much dialogue.

Correct Answer: C

Rationale: The correct answer is C. The reference to sending a text message in the passage is a clear indication of the 21st century. This action of sending a text message is a modern communication method commonly associated with contemporary times. Choices A, B, and D do not provide any specific details or actions that distinctly tie them to the 21st century. Choice A focuses on the location of an office, which does not inherently place the passage in a specific time period. Choice B uses a metaphorical reference to Medusa, which is a mythological figure not limited to any particular era. Choice D describes a scene involving running to a parking garage, which could occur in various time periods without indicating a specific century.