Question

embryonic development __________. a refers to the first week b refers to week two through month two c refers to months three through nine d all apply.

Explanation:

Embryonic development is a complex process. The first week is the germinal stage. Weeks two through month two is the embryonic stage. Months three through nine is the fetal stage. So, embryonic development does not refer to all these stages.

Answer:

None of the options are correct as embryonic development specifically refers to week two through month two (the embryonic stage). If we assume there is a mistake in the options and we have to choose from the given ones based on the knowledge that embryonic stage is weeks 2 - 8 (approx two months), then B. refers to week two through month two.