Although since its inception in the 1970s, the Standard Model
accurately predicted the existence of a range of particles, including the Higgs boson, whose discovery in 2012 at CERN electrified the scientific community, it cannot explain a number of conundrums such as what dark matter, a theoretical form of matter that is believed to account for approximately 85% of the matter in the universe,
is and why the Higgs boson
possesses the mass that it
does.
the subordinate clause is in simple past tense - the Standard Model accurately predicted
whereas the Main clause is in Simple present tense - it cannot .... - what dark matter is and why the HB possesses the mass that it does.
A. Although since its inception in the 1970s, the Standard Model - verb tense issue - incorrect
B. Although since its inception in the 1970s, the Standard Model has - the standard model has .... and the verb tense in main clause are now aligned - correct
C. Since its inception in the 1970s, the Standard Model has - no contrast which is essential for the intended meaning - incorrect
D. Because since its inception in the 1970s, the Standard Model has - no contrast which is essential for the intended meaning - incorrect
E. Owing to its inception in the 1970s, the Standard Model - verb tense issue and no contrast - incorrect
Answer - B