After Estimating a Probit Model for the Likelihood of a Website

Multiple Choice

After estimating a probit model for the likelihood of a website visitor clicking through conditional on if the visit occurred on a weekday or not, you get the following results: ClickThrough_i = -1.2(0.4) + 0.8(0.2) WeekDay_i, where standard errors are reported in parenthesis. What would be the calculation that yields the marginal effect of a visit moving from a weekend to a weekday on click-throughs?

A) -1.2 + 0.8 = -0.4
B) 0.8
C) Φ(-1.2 + 0.8) - Φ(-1.2)
D) Φ(-1.2)