OFFICIAL EXPLANATION


The missing word in the first blank reflects on how human beings of the pre-civilization era sharpened the hunting skills of their offspring. Thus 'honing' which collocates with skills is the best answer choice in the context. The missing word in the second blank provides description of what type of training, 'helps the new recruits to understand the operations of machines'. And 'formal' is the apt answer choice. The last sentence of the text states that management institutes are adding on managerial skills to technical skills. Thus 'supplement' best fits in blank 3. Thus, the answer is $\(\mathrm{C}, \mathrm{E}, \mathrm{I}\)$.