Please select the best possible Ans for the following questions? Thank you

Question 8 (1 point) Which command can be used to show that an index has been removed on table fuinfo? Questions 12 - 14 are based on the following table definition: CREATE TABLE fuinfo ( fid int(10) unsigned NOT NULL, name varchar(40) NOT NULL, email varchar(128) NOT NULL, UNIQUE KEY email (email), UNIQUE KEY fid (fid) ) ENGINE=MyISAM DEFAULT CHARSET=utf8

a DESCRIBE fuinfo;

b EXPLAIN fuinfo;

c SELECT * from fuinfo;

d SHOW fuinfo;

Question 9 (1 point) What are indexes in a database?

a Indexes are locations of tables within a database.

b Indexes are the quick references for fast data retrieval of data from a database.

c Indexes are the slow references for fast data retrieval of data from a database.

d Indexes are the quick references for fast data inserts of data.