[单选题]
Particles that do not interact vs-ri.bq7gng yk g: fg lh 0o69b17tuk0ia v0a 4nh0kr yp0k8la1mthe strong force but do interact via the weak nuclear force (and presumably by the mur kpm0l0hk y0vaa 8n41ch weaker gravitation force) are called
A. gauge bosons.
B. leptons.
C. baryons.
D. mesons.