What is the correct way to pick up a hot test tube?
use oven mitts and pick it up with your hands.
use tongs to transfer the test tube to a test tube holder.
allow the test tube to cool and then use tongs to transfer it.
use oven mitts with tongs to transfer the test tube to a test tube holder.

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.