To find current in a resistance connected in a network, Thevenin's theorem is used $$V_{TH}$$ = 20 V and $$R_{TH}$$ = 5 Ω. The current through the resistance:

A

is 4 A

B

is 4 A or less

C

is less than 4 A

D

May be 4 A or less or more than 4 A