Which of these actions is an unsustainable practice? O A. Expanding the amount of fossil fuels extracted from an area
O B. Limiting the number of fish harvested in an area
O C. Selling locally caught fish in a local market
O D. Selling extra carbon credits on an international carbon market

b :limiting the number of fish...

expanding the amount of fossil fuels extracted from an area

Explanation:

the other answer on was wrong

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.