A Mutation in the Gene Encoding Troponin Has Occurred in a Mouse.What

A mutation in the gene encoding troponin has occurred in a mouse.What is a possible effect that this mutation could have on muscle activity?

A) Signals from nerve impulses may be blocked from initiating an action potential in the muscle cell membrane.
B) An action potential may be prevented from traveling down the T tubules.
C) Calcium pumps in the sarcoplasmic reticulum may be blocked from releasing calcium into the sarcoplasm.
D) Increases in calcium concentration in the sarcoplasm may not lead to cross-bridge formation between actin and myosin.
E) Both c and d