Where two factors, each of which is sufficient to bring about the harm in question, together cause a harm, the "but for" rule of causation is not useful

A group of words that looks like a sentence but is missing either a subject, a verb, or a complete thought is called a(n) ________

A) run-on B) comma splice C) fragment D) independent clause

Which of the following can be used to solve integer programs with 2 variables?

I. Graphical techniques II. Complete enumeration III. Relaxed LP solutions IV. Branch and bound A) I, II, III, and IV B) I and III C) I, II, and IV D) I and IV E) I, II and III