I have here a sentence with an ambiguous antecedent.
Computers have larger screens than smartphones, the reason why they are still necessary.
The pronoun "they" can refer back to "computers", "screens" or "smartphones". Is it possible to resolve this ambiguity by mixing up plurals and singulars?
Computers have a larger screen than the smartphone, the reason why they are still necessary.
Or can't I avoid to restructure the complete sentence?
The reason why computers are still necessary is that they have larger screens than smartphones.