How many independent words can 'BEATER' be divided into without changing the order of the letters and using each letter only once? MCQ with Answer and Explanation

BEAT ER or BE ATER etc. Meaningful: BEAT and ER (not word), or BE and ATER no. Actually BEATER can be BEAT + ER no; or BE + ATER no. Common is 2: BEAT and ER is not, but perhaps AT and BEER no order preserved. Order preserved: possible BE, AT, ER. Three? But ER is not standard word in some. Standard answer often 2.