By US law, exit signs in buildings must be one of what two colors?

More Questions:

What brand of gasoline introduced an additive called "Platformate" in 1968?

What comic strip cat was created by Otto Messmer and Pat Sullivan in 1919?

Who is the Roman equivalent of the Greek god Apollo?

Which Oscar Wilde character stayed young as his picture aged?

Which two elements are the most common in the universe?

What actress earned an Oscar nomination for her first screen appearance in "Raging Bull"?

What animated movie takes its name from a Yiddish word meaning monster?

What was the name of Edgar Bergen's dummy?

What Russian republic was dubbed "Yeltsin's Vietnam"?

What city was talk show host Jerry Springer mayor of from 1977-1978?

'Antonine Plague" was also known by what other name?

What century did the Icelandic Vikings first reach the island of Newfoundland?

What Soviet operation forced over 2,000 scientists and engineers to relocate from East Germany to Russia to work on missile design and production?

What is Joseph Priestley credited with discovering?

Corsica is part of which country?