Two positive charges are placed as shown in the diagram. Which arrow best represents the electrostatic force from the white positive charge onto the yellow positive charge?
O A- towards
OB-away
O C-up
O None of the above

i'm assuming that the correct answer is indeed the first one/ "a"..

the answer your looking for is c).

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.