10 POINTS + BRAINLIEST ANSWER!!

4a - j = 7a + 3
4b - k = 7b + 3

In the equation shown above, j and k are constants. If j is k plus 1, which of the following is true?

A. a is b plus 1/3.

B. a is b minus 1/3.

C. a is b minus 1.

D. a is b minus 3.