Explanation:

The correct answer is (c) computer consultant. A computer consultant's primary role is to provide expert, unbiased advice to individuals or organizations on how to best leverage information technology to achieve their business objectives. This involves a thorough analysis of buyer needs, identifying suitable hardware and software solutions, and often assisting with implementation and optimization. They act as an independent advisor, bridging the gap between business requirements and technological capabilities. (a) A computer scientist focuses on theoretical foundations of information and computation, and practical techniques for their implementation. Their role is more about research, development of new algorithms, and advancing the field of computing, not client-facing hardware/software procurement. (b) A computer sales representative primarily sells computer products or services. While they might help match products to customer needs, their main objective is sales, and their advice is often product-specific rather than a comprehensive, unbiased consultation on overall IT strategy. (d) A corporate trainer is responsible for educating employees within an organization on various skills, including how to use specific software applications or hardware. Their focus is on instruction and skill development, not on determining the initial IT infrastructure needs or sourcing appropriate systems for the entire organization. (e) None of these is incorrect, as option (c) accurately describes the role.