After Estimating a Logit Model for the Likelihood of a Website

Multiple Choice

After estimating a logit 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) $\frac { 1 } { 1 + e ^ { - 1.2 + 0.8 } }$
D) $$\frac { 1 } { 1 + e ^ { - 1.2 + 0.8 } }$$ - $$\frac { 1 } { 1 + e ^ { - 1.2 } }$$