Which of the following works are written by John Dennis?
A) The Advancement and Reformation of Modern Poetry
B) The Christian Hero
C) The Grounds of Criticism in Poetry
D) The Conscious Lovers
E) An Essay on the Genius and Writings of Shakespeare
Choose the correct answer from the options given below:

The correct answer is A, C and E.

To understand why this option is correct, let us examine the authorship of each of the literary works listed in the question:
A) The Advancement and Reformation of Modern Poetry: This critical work was written by John Dennis and published in 1701. In it, Dennis argues that passion and religious devotion are essential to great poetry, championing the elevation of modern poetry through religious themes.
B) The Christian Hero: This tract was written by Richard Steele and published in 1701. It is not written by John Dennis.
C) The Grounds of Criticism in Poetry: This is another major work of literary criticism by John Dennis, published in 1704. It serves as a sequel to his earlier critical treatises, outlining his theories on the sublime and the relationship between poetry and religion.
D) The Conscious Lovers: This is a famous sentimental comedy play written by Richard Steele, first performed and published in 1722. It is not written by John Dennis.
E) An Essay on the Genius and Writings of Shakespeare: This work, written in the form of letters, was published by John Dennis in 1712. In this essay, Dennis critiques Shakespeare's works, praising his natural genius while pointing out his lack of classical learning and disregard for the Aristotelian unities.

By analyzing the list, we find that the works written by John Dennis are:
- A (The Advancement and Reformation of Modern Poetry)
- C (The Grounds of Criticism in Poetry)
- E (An Essay on the Genius and Writings of Shakespeare)

Therefore, the combination containing A, C, and E is the correct choice.