Good Evening!

Can you explain the answer to this question for me?

If a consumer's marginal rate of substitution of good X for good Y (MRSxy) is equal to 2, then the:

A Consumer is willing to give up two units of X for one unit of Y

B Slope of a line tangent to the indifference curve at that point is 2.

C Slope of a line tangent to the indifference curve at that point is -2

Thanks!