DB2 create function

What type of function is created using the following command? CREATE FUNCTION TAN (X DOUBLE)
RETURNS DOUBLE
LANGUAGE SQL
CONTAINS SQL
NO EXTERNAL ACTION DETERMINISTIC RETURN SIN(X)/COS(X)

A. Row
B. Table
C. Scalar
D. External

CREATE FUNCTION (SQL scalar, table, or row) statement:
https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.sql.ref.doc/doc/r0003493.html