Which of the Following Symptoms Suggests Smallpox as Opposed to the More

Which of the following symptoms suggests smallpox as opposed to the more common and much less dangerous chickenpox? (Select all that apply.)

A) Child appears only mildly ill until late stages in smallpox.
B) Lesions appear in various stages in the same area of the body rather than all at once.
C) Rash lesions are most abundant on the face and extremities, not on the trunk.
D) Rash occurs 2 to 4 days after sudden onset of fever rather than with the fever.