(A) deep relaxation, if practiced regularly, can strengthen the immune system
(B) one can strengthen the immune system through deep relaxation, if it is practiced regularly
(C) the immune system can be strengthened as a result of deep relaxation if practiced regularly
(D) when deep relaxation is practiced regularly, the immune system can be strengthened
(E) when practiced regularly, the results of deep relaxation can be to strengthen the immune system
Solution:
Modifiers*
Its the case of a hanging modifier. A noun is needed after the comma to relate to the modifier. Only A does so.
A is the best choice.
Sentence Correction - 1000 Questions with Solution: