Which of the following events can result in inheritable genetic variations in organisms?

occurrence of viable errors during DNA replication

 mutation of DNA by environmental factors

 genetic recombination during meiosis

Explanation:

i had this question too this is the right answers based on study island :)

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.