7)ANSWER C) "Any extra embryos can be frozen for implantation later."

Explanation

In vitro fertilization usually creates multiple embryos, of which up to four are implanted. Cryopreservation of excess embryos is common, and they can be implanted at a later date. The wording of this question guides you to look for a correct statement as the answer to the question. Evaluate each option as to whether it is true or false. The true statement is then the correct answer.