Answer the following questions by selecting the correct/most appropriate options.

Railway network is now extensively being built in mountainous areas. Select the most suitable reason.

Correct option is C

There are advanced technological developments to enable it.
The construction of railway networks in mountainous areas has been made possible by advances in technology. Modern engineering techniques and technologies such as tunnel drilling machines, bridge construction methodologies, and stabilization techniques have addressed the challenges posed by steep gradients, unstable terrain, and harsh weather conditions. These technological advancements enable the construction of safer, more efficient railway lines through mountainous regions, enhancing connectivity, economic development, and access to remote areas. This approach is not about the ease of construction in absolute terms, as mountainous terrain presents significant engineering challenges, but rather about the capabilities provided by modern technology to overcome these challenges.