The appropriate atmospheric conditions made it feasible for the astronomers to see the stars and they could even distinguish the sizes. select the correct alternative for bolded words

Answer: With proper atmospheric conditions, astronomers could see the stars and even distinguish between sizes. Choose the correct alternative to the bold word. 

• The size is also different 
• And they even distinguished the size 
• And he could even distinguish the size 
• The size is also different from

 The correct option is the size is also different