Grabowski Suffers from Coronary Artery Disease

Grabowski suffers from Coronary Artery Disease.In October 2006,Grabowski underwent quintuple coronary artery bypass surgery.Grabowski began experiencing heart palpitations the following spring.Medical tests revealed additional blocked arteries.Grabowski immediately told his supervisor at the Lighter Mechanical Works that his doctors had found more blockages,that his condition would be monitored,and that he might need an additional six weeks off for further surgery.Lighter terminated his employment after he had told his supervisor of the monitor and of the possible need for more surgery but before the further surgery became definite.Lighter has violated Grabowski's right under the FMLA because

A) written notice is not necessary and verbal notice can be sufficient.
B) the employee need not expressly assert rights under the FMLA or even mention the FMLA in his notice to the employer.
C) employee must provide a qualifying reason for the needed leave.
D) All of the choices are correct.