Choices that link to same passage

Hi, I can't really find the answer to my question. My question is, in the first passage, there will be two option, A and B. Both of them will link to the passage C. Up to now, I am ok with them. The problem is, I want to add the variables to them. Such as, if i pick A, (set: $variable1 to 1), without affecting $ variable2.
If i pick B, ( set $variable2 to 2), without affecting $variable1.
By the way, how to hide the (display: "Variable Passage")? There is a big blank space in my passage before the text shows up.
I am using Harlowe.