[Answer] 6. Which of these colours was widely used on school buses in the USA and Canada?

Step 1 : Introduction to the question "6. Which of these colours was widely used on school buses in the USA and Canada?"

...1. White 2. Red 3. Yellow 4. Blue It was officially known as National School Bus Glossy Yellow. The colour was adopted in 1939 at a conference to decide on national standards for school buses.

Step 2 : Answer to the question "6. Which of these colours was widely used on school buses in the USA and Canada?"

Yellow:

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