"it can be because" is correct and can be used in written English.
For example, "I'm not sure why I got an A on the test; it can be because I studied hard."
Or it can be because one party becomes uncooperative or greedy.
"It can be because he's giving up, or because he's charging forward at the officer," Baden told the Times.
It can be because unscrupulous lawyers milk the case by firing up the client to be vindictive or difficult.
"It is important the club's financial stability is assured as quickly as it can be because there has to be massive changes to the budget.
"Or it can be because one or both parties become deeply emotional about something small, and they lose sight of the cost.
It can be because of an individual's race, gender, sexuality, religion, age and mental or physical disability – and reports of it in UK workplaces are plentiful.
It can be boring because it is too confused or too logical, or boring because it is hysterical or lethargic, or boring because nothing really happens.
It can be difficult because of the short duration a groom might have with a horse.
It can be grueling, because you take six months to shoot 10 episodes.
It can be done, because the learning curves aren't as steep.
And now it can be anything, because an exciting new dawn beckons online!
