In this paper, we introduce the concept of wsa-supplements and investigate the objects of
the class of short exact sequences determined by wsa-supplement submodules, where a submodule U
of a module M is called a wsa-supplement in M if there is a submodule V of M with U + V = M and
U ∩ V is weakly semiartinian. We prove that a module M is weakly semiartinian if and only if every
submodule of M is a wsa-supplement in M. We introduce CC-rings as a generalization of C-rings
and show that a ring is a right CC-ring if and only if every singular right module has a crumbling
submodule. The class of all short exact sequences determined by wsa-supplement submodules is
shown to be a proper class which is both injectively and co-injectively generated. We investigate the
homological objects of this proper class along with its relation to CC-rings.