Why is EI an ideal ion source to couple with GC while ESI is an ideal ion source to couple with LC$?$

A$.$ Because EI is a gas$-$phase technique and ESI is a liquid$-$based technique

B$.$ Because EI is a liquid$-$based technique and ESI works well with non$-$volatile analytes

C$.$ Because EI works well with non$-$volatile analytes and ESI works well with volatile analytes

D$.$ Because EI works well with volatile analytes and ESI is a gas$-$phase technique