Temperature of a gas

[bbaah]

When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or an increase in volume if the gas is able to expand.

A. When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or

B. When the temperature of a gas is increased, it is accompanied either by an increase in pressure if it is enclosed in a container or

C. When the temperature of a gas is increased, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by

D. Any increase in the temperature of a gas is either accompanied by an increase in pressure if it is enclosed in a container, or by

E. Any increase in the temperature of a gas is accompanied either by an increase in pressure if the gas is enclosed in a container or by


Does anyone know how to tackle this one? I will greatly appreciate some pointers as to why the wrong answers are wrong.

OA is E

[vivek.kapoor83]

idiom ...either x or y has correctly been used in E...where X & Y should be parallel.... by .... by in this case