Properly matching single and double quotes when building text strings via the concatenation operator is often a tedious operation, for any coding language. Three of these lines of PHP code will not work. Which is the correct line of code? print $\text{'}<\text{'}.$ $mType $.\text{'}$ style$=$'width:$80\%$;$">$; print $\text{'}<\text{'}.$ $mType $.\text{'}$ style$=$"width:$80\%$;$">$