Henry can play the guitar _______ the harmonica at the same time.
A. because: because
B. but: but
C. and: and
D. or: or
In this case, we need a word that connects two words of the same type (noun) and the same role in the sentence => use “and”
=> Henry can play the guitar and the harmonica at the same time.
=> Henry can play guitar and mix at the same time.
The answer to choose is: