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What is the subject in this simple sentence?

Egg-laying, pouched, and placental mammals are three subgroups of marsupials.
a. placental
b. pouched
c. Egg-laying
d. mammals

User YvetteLee
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1 Answer

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D. The mammals are the focus, Egg-laying, pouched, and placental are just being used to describe the subject.
User Strayer
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