Sentence Correction (SC) | The vice-president of engineering argued that the biggest

Official Explanation Magoosh:

Split #1: "would" vs. "will". The word "will" denotes the unambiguous factual future: "X will happen." The word "would" indicates the subjunctive, which signals a tentative prediction or hypothetical assertion: "X would happen." Which is correct here? Well, the new alloy is "proposed", so it may be tentative, or perhaps the proposal was fully approved already and the use of the alloy is not in doubt.
...

---