Final answer:
Investment consultants should purchase Professional liability insurance to protect themselves from errors and omissions.
Step-by-step explanation:
Investment consultants should purchase Professional liability insurance to protect themselves from errors and omissions. This type of insurance specifically covers professionals in case they make mistakes or fail to provide professional services that result in financial loss for their clients. It provides coverage for legal fees, settlements, and judgments related to claims of negligence, errors, or omissions.