What weather condition(s) cause(s) the majority of tornadoes to occur in the spring? a) strong winds form in the spring b) spring brings high pressure fronts c) the meeting of the polar air masses and the tropical air masses d) the newly formed pollen from certain trees reacts with the moisture in the atmosphere

C)the meeting of the polar air masses and the tropical air masses

Explanation:

t.                 w               e                 n                   t                 y                 c             h               a           r           a               c                 t             e             r             s        

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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