In Meteorological Terminology, the Primary Difference Between Convection and Advection

In meteorological terminology, the primary difference between convection and advection is:

A) Convection represents upper atmosphere heat transfer and advection represents surface heat transfer.
B) Convection represents vertical heat transfer and advection represents horizontal heat transfer.
C) Convection represents surface heat transfer and advection represents upper atmosphere heat transfer.
D) Convection represents horizontal heat transfer and advection represents vertical heat transfer.
E) None of the above; the terms are used interchangeably.