Who has proposed that Moscow and Washington extend their New Strategic Arms Reduction Treaty (START) that expires in February 2021?

Who has proposed that Moscow and Washington extend their New Strategic

1.	Who has proposed that Moscow and Washington extend their New Strategic Arms Reduction Treaty (START) that expires in February 2021?
A.	Vladimir Putin
B.	Dmitry Medvedev
C.	Donald Trump
D.	Angela Merkel
E.	Kim Jong-un
Answer» B. Dmitry Medvedev