Bob's Funky T-Shirts Began the Year with 1,000 Shirts in Inventory

Bob's Funky T-shirts began the year with 1,000 shirts in inventory, produced 10,000 shirts during the year and ended the year with 1,100 shirts in inventory. The 100 shirts added to his inventory will be classified as

A) investment.
B) exports of goods and services.
C) nondurable consumption goods.
D) consumption expenditure.
E) net exports of goods and services.