Which of the following vulnerabilities are frequently found in web sites? (Select all that apply.) a. Improper or insufficient error handling b. Not validating user input c. Use of TLS to encrypt connections d. Cross-Site Scripting Which of the following are true about Phishing or Spear Phishing. (Select All that apply.) a. It uses known code vulnerabilities to exploit to a network or system. b. Spear Phishing only targets executives or high-ranking people. c. Education is the most effective method for preventing successful Phishing attacks. d. Checking the message header information can help determine if a message ought to be trusted