According to the website, the spanish “x” makes what two sounds? a. “qs” and “gs” c. “ks” and “qs” b. “ks” and “gs” d. the spanish “x” has only one sound.

The Spanish "x" makes four distinct sounds (that I know of). They are "ks", "gs", "h" and "s", although the last two pronunciations are almost exclusively found in proper nouns.

Examples of "ks" pronunciation:
Éxito - "success"
Extraño - "strange"

Examples of "gs" pronunciation:
Examen - "exam"
Exactamente - "exactly"

Examples of "h" pronunciation (proper nouns only):
Mexico
Xavier
Mexicano
Texas
Oaxaca

Examples of "s" pronunciation:
Xitlallie (my cousin's name)
Xilófono - "xylophone"

Since the last two pronunciations are rare in comparison to the first two, the correct answer must be  b. “ks” and “gs”.

Es cierto que marcos vendrá a la fiesta.

2.) es la respuesta a 3.) es la respuesta b 4.) es la respuesta b 5.) es la respuesta a