ANSWER
Options B, C and D have exactly 2 significant figures.
EXPLANATION
To see whether the numbers have exactly 2 significant figures, round all to 2 significant figures. The ones that remains the same have exactly 2 significant figures.
[tex]302\approx 300[/tex]yards to 2.s.f
[tex]980\approx 980[/tex]gallons to 2.s.f
[tex]1200\approx 1200[/tex]feet to 2.s.f
[tex]84\approx 84[/tex]litters to 2.s.f\
[tex]6,040\approx 6,000[/tex]meters to 2.s.f
