A hashtag is a word in a tweet that is preceded by the hash or pound character

In order to add and join tables in a select query, depending on how a table is created, the primary key fields:

A) must be defined. B) may or may not be defined. C) must be defined as a single field primary key. D) must not be defined.

You can support processors that do not recognize an extension element or attribute by using thefallbackelement.

Answer the following statement true (T) or false (F)