What Does the "F Score"for the Treatment Main Effect Tell

Multiple Choice

What does the "F score"for the treatment main effect tell the researcher?

A) If F is larger than 1 then the IV had an effect.
B) The F ratio indicates which group significantly differed from the other.
C) It tells her nothing until she can see if the F she calculated would occur by chance in like conditions less than 5% of the time by looking it up on an F table.
D) a and b