At the Beginning of the Year, Tomʹs Tubes Had a Capital

At the beginning of the year, Tomʹs Tubes had a capital stock of 5 tube inflating machines. During the year, Tom scrapped 2 old machines and purchased 3 new machines. Tomʹs net investment for the year totaled

A) 3 machines.
B) 2 machines.
C) 1 machine.
D) 6 machines.