[单项选择]What is the ending inventory level in dollars using the FIFO Method

We often hear the (21) "Bug" while using computers. But what is a bug In computer science, a bug (22) an error in software or hardware. In software, a bug is an error in coding or logic that causes a program to malfunction or to (23) incorrect results. Minor bugs, for example a cursor that does not behave as (24) can be inconvenient or frustrating, but not damaging to (25) . More severe bugs can cause a program to "hang" ( stop responding to (26) and might (27) the user with no (28) but to restart file program. ), losing whatever (29) work had not been saved. In (30) case, the programmer must find and correct the error by the (31) known as debugging. Because of the (32) risk to important data, commercial application programs are tested and (33) as completely as possible before release. Minor bugs found after the program becomes (34) are c
A. mental
B. physical
C. formal
D. substantial