Directions: The following sentence has four parts marked from a - d. One of the parts may contain an error and if so, identify the part that contains the error and choose the letter corresponding to that part from the given options. If the sentence does not contain any error, choose option (e).

I remember (A) reading somewhere, a field-biologist's (B) estimate, that a colony of a thousand painted storcks (C) requires (D) fifteen to twenty tons of food per day. All correct. (E)