My grandfather is 75 years old and has white hair. He is a very calm and patient man. My uncle is 45 years old and has dark hair. He is more energetic and sometimes a bit impatient.
Which sentence correctly compares my grandfather and uncle?
A) My uncle is calmer than my grandfather.
B) My grandfather is more energetic than my uncle.
C) My uncle is older than my grandfather.
D) My grandfather is more patient than my uncle.