17. when soon bae listens to music, she also
dances. whenever she dances, she also sings.
based only on the information above, which of
the following is a valid conclusion?
a. when soon bae sings, then she is dancing.
b. soon bae sings only when she is dancing.
c. when soon bae listens to music, then she
is also singing.
d. if soon bae is not listening to music, then
she is not dancing.
e. if soon bae is not dancing, then she is not
singing.