Unlike the opinion held by many of his peers that lasers were relatively simple, Arthur Ashkin adhered to his own more complicated ideas about how lasers might operate, and in 2018, at the age of 96, was awarded a Nobel Prize for his invention of 'optical tweezers'.
A. Unlike the opinion held by many of his peers that lasers were relatively simple : Incorrect. Arthur ashkin is compared to opinion.
B. Unlike the opinions of many of his peers that lasers were relatively simple. Incorrect. same error as in option A.
C. Compared to many of his peers’ opinions that lasers were relatively simple. Incorrect. Arthur compared to opinions.
D. Even though many of his peers were convinced that lasers were relatively simple. Correct. This option clearly portrays the contrast and the intended meaning.
E. Even with many of his peers convinced of lasers being relatively simple. Incorrect. Awkward construction.