Don is a citizen of Great Britain and a famous race car driver. He decides to come to the U.S. to open a car dealership in Detroit. He is in the U.S. during the following periods:

• 20Y1: April 1 through August 1
• 20Y2: March 1 through August 1

Which of the following best describes Don's status?

a Resident alien under the green card test.

b Nonresident alien.

c Resident alien under the substantial presence test, starting in 20Y2.

d Citizen of the U.S.