[单选题]
Particles that do not interact vgcp)0p -o-hcsl,h z z2ia tq mt1km;-v5i phe strong force but do interact via the weak nuclear force (and presum5;-k mqtm1p ivably by the much weaker gravitation force) are called
A. gauge bosons.
B. leptons.
C. baryons.
D. mesons.
