In Studying Environmental Relationships, Which of the Following Is True

In studying environmental relationships, which of the following is true?

A) Neither interspecific nor intraspecific relationships study is at the scale of the biome.
B) Both interspecific and intraspecific relationships need to be considered.
C) Intraspecific relationships need to be considered.
D) Neither interspecific nor intraspecific relationships need to be considered.
E) Interspecific relationships need to be considered.