In recent years, cellular (mobile) service providers have worked hard to eliminate "dead zones," providing customers with service wherever they traveled. by working to make the network available in more locations, cellular service companies were focusing on value creation.
financial
promotion
product
place
price

Place

Explanation:

In marketing strategy, there are 4PS which comprises of product, price, place, promotion

The product is the main component which is to be sold to the customer

The price is also a key component in which the buyer and seller agreed.  

The place reflects the comfort zone for the customer in which the customer get their products at their place  

The promotion is the marketing strategy through which the goods and service s are advertised by various tools like - online promotion etc.

By going through the question, we conclude that the place would be the appropriate option in which the network can be available in more locations.

answer; ///(d); determining who competes most closely   with whom evaluating whether industry driving forces and competitive pressure favor some strategic groups and hurt others, and ascertaining whether the profit potential of different strategic groups varies due to the strengths and weaknesses in each groups respective market positions;