Sentence Correction (SC) | Re: After more than four decades of research and development, a new type o

After more than four decades of research and development, a new type of jet engine is being tested that could eventually propel aircraft anywhere in the world within two hours orhelp boost cargoes into space at significantly lower costs than current methods permit.

(A) tested that could eventually propel aircraft anywhere in the world within two hours or help
(B) tested that could eventually have the capability of propelling
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