Mircea Vasilescu maintains an online brokerage account. In early March, Mircea received an e-mail from the firm that explained that there had been a computer error and asked Mircea to call a phone number to verify his customer information. When Mircea called the number, a recording asked that he enter the code from the e-mail, his account number, and his social security number. After he did so, he was told that he would be connected with a customer service representative, but the connection was terminated. He contacted the brokerage company and was informed that they had not sent the e-mail. Mircea was a victim of:

Vishing or Voice phishing is a form of phone fraud. In this form of fraud, fraudulent unveils the private information of the user by pretending that they have called from a legitimate business. They retrieve the private information about the user to scam or fraudulent purposes.

In the given case, Mircea Vasilescu has become a victim of vishing or voice phishing. Mircea has shared all the private information and codes with the person on the phone who disconnected after retrieving the information from him.

So, the correct answer is vishing.