In the question given below, two sentences are given with one blank each. From the given answer choices, choose the option which contains the word that fits in both sentences making them grammatically and contextually correct. 1. Several economists argued that the government’s long-term growth projections rested upon a highly ______ assumption regarding labour productivity. 2. The novelist intentionally left the ending ______ so that readers could construct competing interpretations of the protagonist’s motivations.