One of the major ethical issues President Obama's administration focused on was

A) decreasing environmental legislation.
B) deregulation.
C) tax decreases.
D) incentives to oil companies.
E) health care and consumer protection.

President Obama's administration focused on the issue of health care and consumer protection, aiming to increase access to affordable health care and protect consumers from fraudulent or harmful practices by companies. This was evident in the passing of the Affordable Care Act and the creation of the Consumer Financial Protection Bureau. The other options listed do not align with the ethical priorities of the Obama administration.