What is Synthesis reaction in chemistry

It is a reaction in which multiple reactants combine to form a single product.

Explanation:

catya that's not even a b or 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.