Which of the following statements regarding the end of the first trimester is TRUE?
A. All major organ systems are in place by the end of the first trimester.
B. The face appears embryonic.
C. The fetus cannot yet be sexed.
D. Secondary ossification centers are present.
E. Significant subcutaneous fat is present.
Answer: A. All major organ systems are in place by the end of the first trimester.
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