Since Passage of the Americans with Disabilities Act (ADA)

Since passage of the Americans With Disabilities Act (ADA) :

A) labor force participation rates have increased for moderately disabled persons but remained low for severely disabled persons.
B) employers have lost the majority of federal court cases involving ADA claims.
C) employers are required to make an accommodation for a disabled person even if that action would violate a term or condition of an existing labor agreement (e.g., seniority rights) .
D) all of these
E) none of these.