Noah began racing go-karts when he was just six years old. Noah has traveled to other states to race, win, and finish in the top five, an impressive accomplishment for anyone but especially for a young driver. He now races a 1934 Ford Legends Coupe, a car that weighs 1,000 pounds and goes faster than 100 miles per hour. Noah regularly competes against drivers who are three times older than he is, but he does not let that intimidate him. He explained in one news article, "I have been racing against older people all my life. When you strap on a helmet, you are no longer a 13-year-old kid, you are a racecar driver. The other drivers don't treat me like a kid. They treat me the same as the other drivers on the track." He has the nickname "Little Gator" partly because of his size and partly because of Gatorland's sponsorship over the last several years.

Identify the sentence that explicitly states Noah's accomplishments on the racetrack.

a) Noah began racing go-karts when he was just six years old.
b) Noah has traveled to other states to race, win, and finish in the top five.
c) He now races a 1934 Ford Legends Coupe, a car that weighs 1,000 pounds and goes faster than 100 miles per hour.
d ) Noah regularly competes against drivers who are three times older than he is, but he does not let that intimidate him.