What is the correct answer for the following problem?

$(6\mathrm{.}2$x$106)(3\mathrm{.}1$x$103)$

a$)2$x$103$

b$)2$x$104$

c$)3\mathrm{.}1$x$103$

d$)3\mathrm{.}1$x$106$

Group of answer choices

A

B

C

D