Yes. The president is a person, so you will need to use conocer + a
Use translate it will give answers faster and u will understand
B. - Encuentra
The correct for of "encontrar" that fits the sentence is "encuentra" (él encuentra, he finds).
Hope it helped,
BioTeacher101
<span>carisimo
rápidisimo
riquisimo
larguisimo
fácilisimo
jovensismo
famosisimo
anchisimo</span>