Which Statement About Studies on the Importance of Competition in Nature

Which statement about studies on the importance of competition in nature is false?

A) Nearly all studies find the occurrence of competition; competition is ubiquitous in nature.
B) Many studies find the occurrence of competition; competition is common in nature.
C) Analyses of the studies identified several possible sources of bias, including the failure of researchers to publish studies that show no significant results.
D) Many studies were biased because they overly represented species that were suspected to show competition.