 
 <prompt> Wetin fit make Gray actions dey see as the correct thing to do? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: The matter of who get priority for the variable resistance feature of di telephone na wetin di examiner raise before e approve Bell patent application. E tell Bell say im claim for di variable resistance feature dey also described for Gray's caveat. Bell show am one variable resistance device for Bell previous application wey Bell describe as cup of mercury, no be water. Bell don file di mercury application for di patent office one year earlier on February 25, 1875, long before Elisha Gray describe di water device. For top, Gray abandon im caveat, and because e no contest Bell priority, di examiner approve Bell patent on March 3, 1876. Gray don reinvent di variable resistance telephone, but Bell na di first wey write down di idea and di first wey test am for inside telephone. 