Sentence Correction

In the past, companies claimed that low-fat milk was healthier than regular milk although this usually contains unhealthy chemicals

A. was healthier than regular milk although this usually contains unhealthy chemicals
B. was healthier than regular milk although it usually contains unhealthy chemicals
C. is healthier than regular milk although low-fat milk usually contains unhealthy chemicals
D. was healthier than regular milk although low-fat milk usually contains chemicals that are unhealthy
E. was healthier than regular milk although low-fat milk usually contains unhealthy chemicals



OA E

Source: Economist Gmat