Which of the following statements are true about components of dynamic Apex?

Schema describe is a way to program matically learn about the metadata of your data model within Apex.

Dynamic SOQL refers to the creation of a SOQL string before runtime within an Apex script,

In dynamic SQQL, you use Sring.escapeSinqIeQuoLes (sLrng)to prevent SQQL injection.

You can use dynamic SOSL to create a tree structure of all the objects and fields in your schema browser.