Which Technique Has Been Used Since the 1960s to Attempt

Which technique has been used since the 1960s to attempt to measure solar neutrinos?

A) measuring the interaction of neutrinos with water molecules in huge underground tanks
B) production of radioactive argon nuclei by neutrino interaction with chlorine nuclei in deep underground tanks
C) measuring the proton-proton reaction in liquid hydrogen, where neutrinos play an intermediate role
D) measuring the interactions of neutrinos with radioactive argon nuclei producing chlorine nuclei that can be measured chemically