The correct options are
C cheap labour
D lenient environmental laws
One reason why foreign companies come to India is for cheap labour. Wages that the companies pay to workers, say in the U.S.A., are far higher than what they have to pay to workers in poorer countries like India. For lower pay, companies can get longer hours of work. Additional expenses such as for housing facilities for workers are also fewer. Thus, companies can save costs and earn higher profits. Thus, lenient environmental laws is also another factor.