Question

which of the following might make you suspicious of an email that you receive?
subject line heading of \40% off sale\ with a return address of sales@macy.com
an email that contains an attachment
subject line heading of \you have won $1,000,000!\ with a return address of drcashnow@shaw.ca
an email from your aunt you havent heard from in a year

Explanation:

• The option with subject "You have WON $1,000,000!" and return address drcashnow@shaw.ca is suspicious. Unsolicited emails claiming large winnings are typical phishing/scam attempts. Legitimate businesses don't use such subject lines with non - official - looking email addresses.
• The "40% Off Sale" from sales@macy.com is a legitimate - looking promotional email. Emails with attachments aren't inherently suspicious (though risky if from unknown sources, but the option here is too general). An email from an aunt, while unexpected, isn't as likely a scam as the lottery - type win claim.

Answer:

C. Subject line heading of "You have WON $1,000,000!" with a return address of drcashnow@shaw.ca