While There Are Restrictions for Compounds to Gain Access to Brain,there

While there are restrictions for compounds to gain access to brain,there are mechanisms that can be exploited to facilitate brain penetration,which include:

A) efflux transporters
B) influx transporters
C) receptor mediated transporters
D) enzymatic proteins
E) A & B
F) A & C
G) A & D
H) B & C
I) B & D
J) C & D