The correct answer is B. Also
Step-by-step explanation:
In grammar, a transition is a word or even a set of words that act as a connector between two elements in a sentence, paragraph or text and that states the relationship between on element and the other to create cohesion in writing. This includes words as at first, before, therefore, to summarize, beyond, also or however. This means, in the case of the sentence "Many designers also have a problem choosing color schemes for their websites" the word that is a transition is "also" because this word is the word that shows the connection between ideas as it adds another element into the problems designers experience which means it is a transition between an idea previously mention and a new one.