Задание 30 из ЕГЭ по английскому языку: задача 512

Прочитайте текст с пропуском. В ответе запишите цифру 1, 2, 3 или 4, соответствующую выбранному Вами варианту ответа.

They may be a little unusual, but interspecific friendships occur more often than you might expect. A friendship between a Kenyan lioness and an antelope calf is currently baffling wildlife experts. A lioness would usually eat an oryx, but these animals have been seen walking and resting together with the intimacy of a mother and calf. Experts ____________ reasons for the friendship could be the similarity in looks of the oryx to a lion cub, and the lioness losing the company of her pride.

1. suggest
2. offer
3. propose
4. speculate