A company's marketing emails are either being found in a spam folder or not being delivered at all. The security analyst investigates the issue and discovers the emails in question are being sent on behalf of the company by a third party in1marketingpartners.com Below is the exiting SPP word:

Which of the following updates to the SPF record will work BEST to prevent the emails from being marked as spam or blocked?
A)

B)

C)

D)

A staff member reported that a laptop has degraded performance. The security analyst has investigated the issue and discovered that CPU utilization, memory utilization, and outbound network traffic are consuming the laptop resources. Which of the following is the BEST course of actions to resolve the problem?

The Chief Information Security Officer (CISO) has decided that all accounts with elevated privileges must use a longer, more complicated passphrase instead of a password. The CISO would like to formally document management's intent to set this control level. Which of the following is the appropriate means to achieve this?

An analyst was tasked with providing recommendations of technologies that are PKI X.509 compliant for a variety of secure functions.
Which of the following technologies meet the compatibility requirement? (Select three.)

A security architect is reviewing the options for performing input validation on incoming web form submissions. Which of the following should the architect as the MOST secure and manageable option?