Hello, the answer is:
Plane mirror - The image formed by a plane mirror is always upright, virtual and the same size as the object no matter where the object is placed in front of the mirror. ... Convex mirror – The image formed by a convex mirror is always upright, virtual and diminished no matter the distance of the object from the mirror
The correct answer is b. as long as
This builds a sentence whose realization depends on a fulfilled condition. Other options would create ungrammatical or nonsensical sentences.
Answer:
They probably won't exist anymore. There would be another form of technology that replaces phones.
Or you could say in 20 years, phones will probably be able to transform into other stuff like computers etc.
Explanation: