I think it's c. sorry if I am wrong but I think it's c
Silica nanoparticles offering great potentials in protein adsorption and separation, nucleic acid detection, drug and gene delivery, and bioimaging. https://www.cd-bioparticles.com/t/Properties-and-Applications-of-Silica-Nanoparticles_57.html
Can you please take a photo that's not upsidedown I might be able to help.
The best way to find the correct answer for a sentence completion would be : find that part of the text and look for the answer.
With this , you can find the answer in a more efficient way and in a shorter amount of time
hope this helps
Answer:I think it’s answer D-Were formed by water based solution , water makes everything more flat and smooth , I’m not sure though