<span>On November 19, 1493 Puerto Rico was discovered by Christopher Columbus on his second voyage to claim lands for the rulers of Spain, King Ferdinand and Queen Isabella. In 1493 the island was called Borinquen by the indians who lived there. Columbus named it San Juan Bautista.</span>
I think you are correct, but It may is “Son las tres y cuarenta y cinco” or “ Son quince para las cuatro”
The answer is (a) because compro is bought in Spanish and in the question it says “yesterday he bought the gifts for his mother” so bought would be the best answer. (B) is to buy I guess like I will buy chicken. And (c) is like they bought chicken. How I know this is well I speak Spanish I hope this helps!