A professor of a math class wants to understand the relationship between final exam grade and two predictors: the time students spend preparing for the exam (variable named "prep_time", in hours) and gender (=1 for female, =0 for male). The regression equation he calculated is given as follows

Grade = 45.2 + 3.3 * prep_time + 3.4 * gender,

and the regression coefficients for both gender and prep_time are significant.

If Caroline (a female student) plans to spend 10 hours preparing the exam, according to this regression model, what do we expect her final exam grade to be?

	A.	51.9
	B.	81.6
	C.	78.2
	D.	100