Answer:
well its like when you here something like nails on a chalk bored or you get your sleve wet while washing your hands.
The sentence which is the most subjective is D. My mother had to be the best cook in the world.
It is subjective because that is your own opinion - the other examples are just facts.
Native Americans had grown corn for more than 2000 years. They ate it and used it to brew beer way before the Europeans landed on America on the late 15th century, led by Christopher Columbus.
When the settlers arrived to the West Indies, they were offered corn by the Native American Indians. They learned how to grow it, took seeds back with them and introduced it in Europe.
