As people grow older:

a$.$ Many decrease their involvement in organized religion and increase their involvement in nonorganized religion

b$.$ Many increase their involvement in organized religion and decrease their involvement in nonorganized religion

c$.$ Many increase their involvement in both organized and nonorganized religion

d$.$ Many decrease their involvement in both organized and nonorganized religion

e$.$ Involvement in both organized and nonorganized religion tends to $$tay the same as in younger years