Which constellations are both visible at midnight to an observer in New York State when Earth is
located at position D?

can you attach a picture of the lettuce? : )

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.

the correct answer is c