When Considering the Different Types of Programs Utilized for Gaining

When considering the different types of programs utilized for gaining body weight, which of the following is true?

A) Research shows that the use of specialized machines appears to have an advantage over the use of free weights
B) Isometric exercise is also known as accommodating-resistance exercise
C) Isotonic and isokinetic programs are comparable in their ability to produce gains in muscle size and strength
D) Isometric methods for resistance training may be either the concentric method or eccentric method