Trucks R' Us (TRUS)has a Market Capitalization of $142 Billion,$78

Trucks R' Us (TRUS) has a market capitalization of $142 billion,$78 billion in BB rated debt,and $10 billion in cash.If Trucks R' Us' equity beta is 1.68,then their underlying asset beta is closest to:

A) 1.00.
B) 1.20.
C) 1.32.
D) 1.48.