Mashaal Masha
While researching a topic, a student has taken the following notes:

* In 1897, African American inventor Andrew Beard invented an automatic coupler.
* It improved on the existing design of train car couplers.
* It made the job of connecting train cars safer.
* In 1938, African American inventor Frederick Jones invented a mobile refrigeration system.
* It improved on the existing design of food transport trucks.
* It enabled trucks to carry perishable foods farther.

The student wants to emphasize a similarity between Beard's invention and Jones's invention. Which choice most effectively uses relevant information from the notes to accomplish this goal?
Difficulty: Easy
A: 

Beard's automatic coupler and Jones's mobile refrigeration system both improved on existing designs.

B: 

In 1897, Beard invented an automatic coupler, which made the job of connecting train cars safer.

C: 

Beard's invention made the job of connecting train cars safer, whereas Jones's invention enabled food transport trucks to carry perishables farther.

D: 

Jones's mobile refrigeration system, which he invented in 1938, made it possible for food transport trucks to carry perishable foods farther.

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