A.To create fixed-size layouts

B.To provide relative sizing based on current or root element's font size

C.To define colors

D.To specify the opacity of an element

A.Using regular expressions to sanitize input

B.Employing prepared statements or parameterized queries

C.Concatenating user inputs directly into SQL queries

D.Storing database credentials in the code

A.The main field used for joining tables

B.A password to access the database

C.A unique identifier for each row in a table

D.The highest value in a table

A.<href>

B.<link>

C.<a>

D.<hyperlink>

A.It cannot integrate with APIs

B.It reloads the entire page for every user interaction

C.It is used only for mobile applications

D.It dynamically updates the current page without reloading