Cultural period of the stone age
Mammals first appeared during the Mesozoic Era. The correct option among all the options that are given in the question is option "c". The Mesozoic Era is considered to have lasted for about 180 million years. The Mesozoic Era is divided into three parts and they are the Triassic, the Jurassic and the Cretaceous. The mammals are considered to have evolved during the Triassic period.
The correct answer is <span>A) John F. Kennedy
This was the famous Cuban missile crisis that occurred during Kennedy's presidency. Since the United States had their own bases in Europe close to Russia, Soviets decided to open up their own base in Cuba with missiles in case that the United States started a war. There was a huge problem about this and many people believed a war was going to begin.</span>
