Who was the first man to step on Antarctica And when

A．Jane knows practically everyone.
B．Jane knows Karl isn’t hard to be happy.
C．Karl didn’t order the right thing.
D．Jane always knows exactly what to say.

A．The former was on teaching and the latter is on research.
B．The former was on teaching and the latter is on the combination of teaching and research.
C．The former was on the combination of teaching and research and the latter is on teaching
D．The former was on research and the latter is on teaching.