With what does the CGPM, established in 1875, and its two arms, CIPM and BIPM, concern itself?

Question

AVegetable manures

BResearch in physics

CPetroleum sales

DMeasurement systems

Select from the options above.

Correct Option: 4  

Explanation:
Measurement systems
The CGPM (the Conférence générale des poids et mesures), the CIPM (Comité international des poids et mesures) and the BIPM (Bureau international des poids et mesures) were set up by treaty between 17 states to conduct international activities relating to a uniform system for measuring the metre, kilogram and second. There are 58 members currently, plus 41 associated states and economies. Since 1971 the units the CGPM and BIPM define are: the metre, the kilogram, the second, the ampere, the kelvin, the mole, and the candela.