In each of these questions, a part of the sentence has been underlined. Find the best way of writing the underlined part of the sentence.
To prepare himself, he subjected himself to two weeks of total abstinence and intensive training in the open fields of Panipat, \(\underline{\text{climbing}\ \text{the}\ \text{hills}\ \text{nearby}\ \text{30}\ \text{times,}\ \text{spend}\ \text{nights}\ \text{in}\ \text{the}\ \text{open}\ \text{and}\ \text{to}\ \text{test}\ \text{to}\ \text{see}\ \text{how}\ \text{long}\ \text{he}\ \text{could}\ \text{hold}\ \text{out}\ \text{wiyhout}\ \text{food}}\)