SAT Vocab Builder

Answer: Choice (A) is correct.

Millennia is the plural form of millennium, so look for a pair in which the second term is the plural form of the first. Choice B is incorrect, because the plural form should be sons-in-law. Choice C is incorrect, because the plural form should be antennae. Choice D is incorrect because the plural form - dice - is the first word in the pair. Alumnae is the plural form of alumna, so (A) is the best choice.