When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.) A. Is at the maximum distance from CG of the rivet group B. Is at the minimum distance from CG of the rivet group C. Gives the maximum angle between the two forces Fa and Fm D. Gives the minimum angle between the two forces Fa and Fm

The correct answer is: A. Is at the maximum distance from CG of the rivet group.

The most heavily loaded rivet will be the one that experiences the greatest shearing force. The shearing force is proportional to the distance from the center of gravity of the rivet group. Therefore, the rivet that is at the maximum distance from the center of gravity will experience the greatest shearing force and will be the most heavily loaded.

Option B is incorrect because the rivet that is at the minimum distance from the center of gravity will experience the least shearing force and will be the least heavily loaded.

Option C is incorrect because the angle between the two forces Fa and Fm does not affect the shearing force on the rivet.

Option D is incorrect because the minimum angle between the two forces Fa and Fm will result in the least shearing force on the rivet.