Question

according to this selection, the only way to find all the bugs in a game is to
a hire a skilled lead designer.
b improve the collision of objects.
c repeat all lines of code.
d play a game repeatedly.

Explanation:

Playing a game repeatedly allows one to experience different scenarios and interactions, which helps in uncovering all possible bugs. A lead - designer may not catch all bugs, improving object collision is a part of fixing bugs rather than finding them, and repeating code lines doesn't guarantee finding all bugs.

Answer:

D. play a game repeatedly